Usually means: Oxide containing three oxygen atoms.
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We found 16 dictionaries that define the word sesquioxide:

General (13 matching dictionaries)
  1. sesquioxide: Oxford Learner's Dictionaries
  2. sesquioxide: Collins English Dictionary
  3. sesquioxide: Wordnik
  4. sesquioxide: Wiktionary
  5. sesquioxide: Webster's New World College Dictionary, 4th Ed.
  6. sesquioxide: Infoplease Dictionary
  7. Sesquioxide, sesquioxide: Dictionary.com
  8. Sesquioxide: Wikipedia, the Free Encyclopedia
  9. Sesquioxide: Online Plain Text English Dictionary
  10. sesquioxide: Webster's Revised Unabridged, 1913 Edition
  11. Sesquioxide: AllWords.com Multi-Lingual Dictionary
  12. sesquioxide: FreeDictionary.org
  13. sesquioxide: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. sesquioxide: Encyclopedia

Medicine (2 matching dictionaries)
  1. sesquioxide: Merriam-Webster Medical Dictionary
  2. online medical dictionary (No longer online)

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Definitions from Wiktionary (sesquioxide)

▸ noun:  (chemistry) Any oxide containing three oxygen atoms for every two atoms of another element.

Similar:
sesquioxyd, dioxide, trioxide, sesquichloride, hexoxide, sesquicarbonate, octoxide, pentadecaoxide, sulfur oxide, oxide, more...

Opposite:
dioxide, monoxide, trioxide

Phrases:
chromium sesquioxide, more...

Adjectives:
hydrated, pure, hydrous, brown, black, little, anhydrous, green, red, insoluble, much

▸ Words similar to sesquioxide

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Similar:
sesquioxyd, dioxide, trioxide, sesquichloride, hexoxide, sesquicarbonate, octoxide, pentadecaoxide, sulfur oxide, oxide, more...

Opposite:
dioxide, monoxide, trioxide

Phrases:
chromium sesquioxide, more...

Adjectives:
hydrated, pure, hydrous, brown, black, little, anhydrous, green, red, insoluble, much



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